Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Gelco Chimney Cleaning in Montclair, CA | Firebrick Chimney Sweep
We provide independent Gelco chimney cleaning, inspection, and Claremont Gelco service across Montclair’s 91763 zip code. What makes our Gelco work different here: we understand how foothill thermal cycling and wind-driven leaf blockage age these units in ways flatland cities never see. If your Gelco fireplace or insert is smoking, drafting poorly, or hasn’t been scoped in years, call (866) 520-4943 for a straight diagnosis and a free estimate.
We work on Gelco wood-burning inserts, freestanding stoves, multi-flue caps, and damper assemblies throughout Montclair. Firebrick Chimney Sweep is an independent service provider, not authorized or sponsored by Gelco, and we repair rather than replace whenever the firebox, liner, and cap are still sound. When a sweep turns up a cracked flue tile or a failed damper gasket, we fix it on the spot instead of handing you a referral. One company, start to finish. For broader Gelco sales and service questions, see our Gelco sales & service page. Call (866) 520-4943 to book.
Why Montclair Residents Choose Us for Gelco Service
Gelco units on Montclair’s mid-century tract homes age differently than the same units in Gelco repair in Ontario. The reason is simple physics: foothill air cools fast after sundown, so fireplaces here cycle hot-then-cold more often than anywhere in the flatlands. That repeated shock works on damper gaskets, mortar joints, and clay flue tiles in ways a once-a-year sweep won’t catch unless the person doing the sweep knows what they’re looking at.
We do. Nelson Quijada, our owner and lead specialist, spent two decades working on chimneys in hillside and valley homes across Southern California, and he learned early that a smoky fireplace is rarely just a dirty flue. It’s usually a cap that’s packed, a gasket that’s dried out, or a liner joint that’s failed. When we clean a Gelco fireplace in Montclair, we check all of it because that’s what the climate here demands. “A dirty flue isn’t a maintenance issue, it’s a fire waiting on a cold night.” We scope the flue, check the cap, and test the damper seal. Then we tell you what’s actually wrong and what it costs to make it right.
Styles & brands we work with





Common Gelco Chimney Cleaning Problems We Solve in Montclair
- Top-sealing damper gaskets that dried out and cracked. Gelco top-sealing dampers sit on exposed masonry stacks, and Montclair’s sharp night cooling bakes then freezes the rubber gasket repeatedly. Once it cracks, cold air and downdrafts push smoke back into the living room even when the flue is clean. We replace the gasket with OEM Gelco parts when available, or a quality aftermarket equivalent, and the draft comes back.
- Exterior caps packed with leaf litter and seed pods. The older foothill-adjacent tracts off the 91763 core have mature street trees dropping debris straight onto chimney caps and spark screens. A Gelco multi-flue cap can get blocked solid before the first cold snap, and owners read it as a dirty chimney when it’s really a ventilation choke at the top. We clear the cap, then scope the flue to make sure nothing else is hiding.
- Clay flue tile liners cracking behind Gelco inserts. Decades of heat-up/cool-down cycling open hairline cracks and spall the tile joints above Gelco inserts. A top-down sweep won’t show it. Only a camera scope does. We find these cracks during routine Montclair cleanings more often than you’d expect, and we repair them before they become a firebox or chase fire risk.
- Firebox mortar erosion and hairline cracking after idle months. Montclair’s dry Santa Ana season leaves fireboxes sitting cold for months, then a sudden first fire shocks the masonry. Joints that were fine in spring start spalling in November. We repoint the firebox brick on Gelco masonry fireplaces so the unit is safe to burn again.
- Creosote buildup from partially seasoned wood. Foothill nights mean more actual wood burning here than in the surrounding flatland cities, and not all of it is properly seasoned. Glazed creosote accumulates in Gelco stove and insert flues, especially when fires are damped down overnight. We remove it with the right brushes and solvents for the flue type, not whatever’s on the truck.
Gelco Service in Montclair: What Local Conditions Mean for Your Equipment
Montclair sits in the San Gabriel Valley foothills, and the 91763 tracts cool off sharply at night even when daytime temperatures are mild. That’s the single biggest factor in how Gelco units age here. The wood stoves and fireplaces in these mid-century homes cycle hot-then-cold far more than in flatland cities to the south, and repeated thermal shock is what cracks crowns, opens mortar joints, and dries out Gelco damper gaskets. It’s also why a fireplace that worked fine in March will smoke in November even though nobody touched it all summer.
The older foothill-adjacent neighborhoods with mature street trees add a second problem: wind-driven leaf litter and seed pods get drawn into exterior caps and spark screens, strangling draft before the first fire. In Gelco repair in Upland, caps stay clearer because the trees are younger and the wind patterns differ. In Montclair, a blocked Gelco cap is often the entire problem, and the fix is an hour on the roof, not a full sweeping. We check the cap on every Gelco service call here because skipping it means misdiagnosing half the smoky-fireplace complaints in this city.
Gelco Models & Products We Service in Montclair
We service Gelco wood-burning fireplace inserts with glass-door fronts, Gelco freestanding wood stoves, Gelco multi-flue chimney caps, and Gelco replacement dampers including top-sealing damper assemblies. When parts are needed, we use OEM Gelco dampers, caps, and gaskets where they’re still available, and quality aftermarket equivalents when Gelco has discontinued a part. We tell you which one we’re using and why before any work happens.
Our repair-first stance is simple: if the firebox, liner, and cap are sound, we repair. A full Gelco insert replacement only makes sense when the liner is compromised or the firebox is spalling beyond repointing. Most Montclair calls end in a cleaning, a cap clearing, or a damper gasket replacement, not a new insert.
See the difference
Before
After
Before
After
Before
AfterGelco Service Pricing in Montclair
Gelco chimney cleaning in Montclair typically runs between $150 and $250 for a standard sweep and inspection, depending on flue condition and accessibility. Adding a Level 2 camera inspection brings the total to $300 to $450. Cap clearing starts around $75 to $150. Top-sealing damper replacement runs $300 to $550 with parts. Firebox repointing and clay tile repairs are quoted after we scope the flue.
What drives the cost is what the camera finds. A clean flue needs a sweep. A cracked liner or failed damper gasket needs more. We don’t recommend work we can’t show you on video, and we don’t sell liners to people with sound liners. Call (866) 520-4943 for an exact quote. Estimates are free, and we’ll tell you plainly if the unit can wait.
Serving Montclair, CA — Our Local Coverage Area
We’re based in the Gelco service in La Verne area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Gelco Chimney Cleaning in Montclair
A Gelco fireplace that smokes only when temperatures drop usually has a draft or seal problem, not a dirty flue. Cold nighttime air sinks into the chimney, and if the top-sealing damper gasket has dried out or the cap is partially blocked, that cold column pushes smoke back into the room. We see this constantly in Montclair because the foothill temperature swing is so sharp. The fix is usually a gasket replacement or a cap clearing, not a full sweep. Call (866) 520-4943 and we’ll diagnose it on the first visit.
If you’ve owned the home for years and the insert has been cleaned annually without changes, a standard sweep is usually enough. If you just bought the house, changed fuel, had a chimney fire, or the unit has been idle for multiple seasons, get a Level 2 inspection. It includes the camera scope that finds cracked clay tile joints and hidden firebox damage a sweep can’t see. In Montclair’s thermal-cycling climate, we recommend a Level 2 every two to three years for Gelco inserts. Call (866) 520-4943 to schedule either.
Montclair’s older foothill-adjacent tracts have mature street trees that drop leaves and seed pods directly onto chimney caps, and the Santa Ana winds push more debris into the mesh screens. A Gelco multi-flue cap with a fine spark screen catches everything. The fix is regular cap clearing, and on some homes we recommend a coarser screen or a cap design that sheds debris better. Call (866) 520-4943 and we’ll assess your specific roof and tree situation.
Usually yes. Hairline cracking and joint erosion from Montclair’s thermal cycling can almost always be repointed with refractory mortar, which is far cheaper than a rebuild and restores the firebox’s structural integrity. The exception is when brick itself has spalled or the firebox has shifted, which calls for more extensive work. We’ll show you the damage on camera and tell you what’s genuinely needed. Call (866) 520-4943 for an honest assessment.
For many 1950s-70s tract homes in the 91763 area, a Gelco insert makes solid sense if the existing masonry fireplace has a sound liner and firebox. The insert tightens draft and improves heat output in those rooms that get cold fast on foothill nights. But if the existing clay liner is cracked or the firebox is spalling, you’ll need to address those first or the conversion won’t perform. We’ll scope the flue and tell you if your home is a good candidate. Call (866) 520-4943.
Service Areas Near Montclair
In addition to our Montclair service area work, Firebrick Chimney Sweep covers nearby communities across the San Gabriel Valley and beyond. We provide Gelco service in Chino for customers in that city’s older ranch tracts, and Gelco service in Tustin for homes in central Orange County. For full local coverage details, see our Montclair service area page and call (866) 520-4943 to book any of these locations.
Book Your Gelco Service in Montclair Today
If your Gelco fireplace or insert is smoking, drafting weak, or overdue for a cleaning, call (866) 520-4943 now. We’ll scope the flue, clear the cap, check the damper seal, and tell you exactly what’s wrong and what it costs to fix. Montclair appointment slots fill fast as cold season approaches months away, so schedule before the first cold snap hits.
Written by Nelson Quijada, Owner & Lead Chimney Specialist at Firebrick Chimney Sweep, serving Montclair’s 91763 area.